See 'autopista' in the Falsos Amigos dictionary.
Inflexiones de 'autopista' (n): fpl: autopistas

WordReference English-Spanish Dictionary © 2014:

Principal Translations
autopista nf (carretera sin cruces)motorway UK, freeway US n
 Cortaron por obras uno de los dos carriles de la autopista.
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'autopista' found in these entries
In the Spanish description:

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